2014-07-292011-11-092010-04-30OLIVEIRA, Raquel Priscila de Castro. Performance of two nile tilapia strains in different stocking densities in raceway system. 2010. 105 f. Tese (Doutorado em Ciências Agrárias) - Universidade Federal de Goiás, Goiânia, 2010.http://repositorio.bc.ufg.br/tede/handle/tde/1126This study was developed in order to analyze productive performance, economic evaluation, bromotological composition of fish fillet, body components percentage and glucose level of two of Nile tilapia strains (chitralada and supreme) in three stocking densities (90, 120 and 150 fish/m3) in the raceway system. This work was carried out at the Fish Culture Sector from Universidade Federal de Goias. A total of 1,440 Nile tilapia fingerlings were produced in 24 polyethylene water tanks, adapted to raceway system. Each experimental unit had individual pipe for water supply and flow was regulated to allow total exchange every 30 minutes, regardless of stocking density. The animals were fed three times a day with commercial extruded ration, ad libitum, seven days a week. The design was completely randomized in a 2 x 3 factorial arrangement and four replications. The results were submitted to variance analysis and, in cases of statistical variance, to the Tukey test (5%). After the all variables analysis, it was concluded that both strains presented positive characteristics for production in Goias State in raceway system. Supreme strain, in higher water density, is the one recommended by this study due to greater profitability, and to positive performance aspects.application/pdfAcesso AbertoAlto fluxo de águaChitraladaOreochromis niloticusProdutividadeSupremeChitraladaHight water flowOreochromis niloticusProductivitySupreme1.Piscicultura; 2.Sistema Raceway; 3.Tilápia DesempenhoCNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::PRODUCAO ANIMALTese